v4.0.0

• Update through2 to 3.0.1 (from 2.0.0) BREAKING: readable-stream 2 -> 3
• Update flush-write-stream to 2.0.0 (from 1.0.0) BREAKING: readable-stream ^2.3.6 -> ^3.1.1
• Update concat-stream to 2.0.0 (from 1.5.0) BREAKING: readable-stream ^2.2.2 -> ^3.0.2
• Update duplexify to 4.0.0 (from 3.4.2) BREAKING: readable-stream ^2.0.0 -> ^3.1.1

v3.0.0

• Update to pump@3.0.0. Returns the last stream the pipeline to enable chaining. (Use the individual modules to avoid potentially unnecessary major updates in your project).

v2.0.0

• Update to pump@2.0.1. (Use the individual modules to avoid potentially unnecessary major updates in your project)
• Pin engines support to >= Node 4.0.0. Run Node LTS or greater.